12) Suppose an oil corporation has several thousand drilling sites available in an area of the North Sea. Exploratory wells were drilled in a simple random sample of 50 sites. In 20 of the drilled wells, they found an abundance of oil, and in the remaining 30, they did not. A hypothesis test was conducted to determine if these drillings had a higher success rate than previous exploratory drilling. The success rate of the corporation's prior exploratory drillings was 35%. Which of the following statements are true? (Select all true statements)